--- /dev/null
+/*
+ * Copyright (c) 2008 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+/* $apfw: if_pflog.c,v 1.4 2008/08/27 00:01:32 jhw Exp $ */
+/* $OpenBSD: if_pflog.c,v 1.22 2006/12/15 09:31:20 otto Exp $ */
+/*
+ * The authors of this code are John Ioannidis (ji@tla.org),
+ * Angelos D. Keromytis (kermit@csd.uch.gr) and
+ * Niels Provos (provos@physnet.uni-hamburg.de).
+ *
+ * This code was written by John Ioannidis for BSD/OS in Athens, Greece,
+ * in November 1995.
+ *
+ * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
+ * by Angelos D. Keromytis.
+ *
+ * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
+ * and Niels Provos.
+ *
+ * Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis
+ * and Niels Provos.
+ * Copyright (c) 2001, Angelos D. Keromytis, Niels Provos.
+ *
+ * Permission to use, copy, and modify this software with or without fee
+ * is hereby granted, provided that this entire notice is included in
+ * all copies of any software which is or includes a copy or
+ * modification of this software.
+ * You may use this code under the GNU public license if you so wish. Please
+ * contribute changes back to the authors under this freer than GPL license
+ * so that we may further the use of strong encryption without limitations to
+ * all.
+ *
+ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
+ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
+ * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
+ * PURPOSE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/mbuf.h>
+#include <sys/proc_internal.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+
+#include <net/if.h>
+#include <net/if_types.h>
+#include <net/route.h>
+#include <net/bpf.h>
+
+#if INET
+#include <netinet/in.h>
+#include <netinet/in_var.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#endif
+
+#if INET6
+#if !INET
+#include <netinet/in.h>
+#endif
+#include <netinet6/nd6.h>
+#endif /* INET6 */
+
+#include <net/pfvar.h>
+#include <net/if_pflog.h>
+
+#define PFLOGNAME "pflog"
+#define PFLOGMTU (32768 + MHLEN + MLEN)
+
+#ifdef PFLOGDEBUG
+#define DPRINTF(x) do { if (pflogdebug) printf x ; } while (0)
+#else
+#define DPRINTF(x)
+#endif
+
+static int pflog_create_dev(void);
+static errno_t pflogoutput(struct ifnet *, struct mbuf *);
+static errno_t pflogioctl(struct ifnet *, unsigned long, void *);
+static errno_t pflogdemux(struct ifnet *, struct mbuf *, char *,
+ protocol_family_t *);
+static errno_t pflogaddproto(struct ifnet *, protocol_family_t,
+ const struct ifnet_demux_desc *, u_int32_t);
+static errno_t pflogdelproto(struct ifnet *, protocol_family_t);
+
+static LIST_HEAD(, pflog_softc) pflogif_list;
+
+struct ifnet *pflogifs[PFLOGIFS_MAX]; /* for fast access */
+static int npflog;
+static lck_attr_t *pflog_lock_attr;
+static lck_grp_t *pflog_lock_grp;
+static lck_grp_attr_t *pflog_lock_grp_attr;
+static lck_mtx_t *pflog_lock;
+
+void
+pfloginit(void)
+{
+ int i;
+
+ if (pflog_lock != NULL)
+ return;
+
+ pflog_lock_grp_attr = lck_grp_attr_alloc_init();
+ pflog_lock_grp = lck_grp_alloc_init("pflog", pflog_lock_grp_attr);
+ pflog_lock_attr = lck_attr_alloc_init();
+ pflog_lock = lck_mtx_alloc_init(pflog_lock_grp, pflog_lock_attr);
+ if (pflog_lock == NULL) {
+ panic("%s: unable to allocate lock", __func__);
+ /* NOTREACHED */
+ }
+ LIST_INIT(&pflogif_list);
+ for (i = 0; i < PFLOGIFS_MAX; i++)
+ pflogifs[i] = NULL;
+
+ pflog_create_dev();
+}
+
+static int
+pflog_create_dev(void)
+{
+ struct pflog_softc *pflogif;
+ struct ifnet_init_params pf_init;
+ int error = 0;
+
+ lck_mtx_lock(pflog_lock);
+ if (npflog >= PFLOGIFS_MAX) {
+ error = EINVAL;
+ goto done;
+ }
+
+ if ((pflogif = _MALLOC(sizeof (*pflogif),
+ M_DEVBUF, M_WAITOK|M_ZERO)) == NULL) {
+ error = ENOMEM;
+ goto done;
+ }
+
+ bzero(&pf_init, sizeof (pf_init));
+ pf_init.name = PFLOGNAME;
+ pf_init.unit = npflog;
+ pf_init.type = IFT_PFLOG;
+ pf_init.family = IFNET_FAMILY_LOOPBACK;
+ pf_init.output = pflogoutput;
+ pf_init.demux = pflogdemux;
+ pf_init.add_proto = pflogaddproto;
+ pf_init.del_proto = pflogdelproto;
+ pf_init.softc = pflogif;
+ pf_init.ioctl = pflogioctl;
+
+ bzero(pflogif, sizeof (*pflogif));
+ pflogif->sc_unit = npflog;
+
+ error = ifnet_allocate(&pf_init, &pflogif->sc_if);
+ if (error != 0) {
+ printf("%s: ifnet_allocate failed - %d\n", __func__, error);
+ _FREE(pflogif, M_DEVBUF);
+ goto done;
+ }
+
+ ifnet_set_mtu(pflogif->sc_if, PFLOGMTU);
+ ifnet_set_flags(pflogif->sc_if, IFF_UP, IFF_UP);
+
+ error = ifnet_attach(pflogif->sc_if, NULL);
+ if (error != 0) {
+ printf("%s: ifnet_attach failed - %d\n", __func__, error);
+ ifnet_release(pflogif->sc_if);
+ _FREE(pflogif, M_DEVBUF);
+ goto done;
+ }
+
+#if NBPFILTER > 0
+ bpfattach(pflogif->sc_if, DLT_PFLOG, PFLOG_HDRLEN);
+#endif
+
+ LIST_INSERT_HEAD(&pflogif_list, pflogif, sc_list);
+ pflogifs[npflog] = pflogif->sc_if;
+ ++npflog;
+done:
+ lck_mtx_unlock(pflog_lock);
+
+ return (error);
+}
+
+#if 0
+int
+pflog_destroy_dev(struct ifnet *ifp)
+{
+ struct pflog_softc *pflogif = ifp->if_softc;
+
+ lck_mtx_lock(pflog_lock);
+ pflogifs[pflogif->sc_unit] = NULL;
+ LIST_REMOVE(pflogif, sc_list);
+ lck_mtx_unlock(pflog_lock);
+
+#if NBPFILTER > 0
+ bpfdetach(ifp);
+#endif
+ if_detach(ifp);
+ _FREE(pflogif, M_DEVBUF);
+ return (0);
+}
+#endif
+
+static errno_t
+pflogoutput(struct ifnet *ifp, struct mbuf *m)
+{
+ printf("%s: freeing data for %s%d\n", __func__, ifp->if_name,
+ ifp->if_unit);
+ m_freem(m);
+ return (ENOTSUP);
+}
+
+static errno_t
+pflogioctl(struct ifnet *ifp, unsigned long cmd, void *data)
+{
+#pragma unused(data)
+ switch (cmd) {
+ case SIOCSIFADDR:
+ case SIOCAIFADDR:
+ case SIOCSIFDSTADDR:
+ case SIOCSIFFLAGS:
+ if (ifnet_flags(ifp) & IFF_UP)
+ ifnet_set_flags(ifp, IFF_RUNNING, IFF_RUNNING);
+ else
+ ifnet_set_flags(ifp, 0, IFF_RUNNING);
+ break;
+ default:
+ return (ENOTTY);
+ }
+
+ return (0);
+}
+
+static errno_t
+pflogdemux(struct ifnet *ifp, struct mbuf *m, char *h, protocol_family_t *ppf)
+{
+#pragma unused(h, ppf)
+ printf("%s: freeing data for %s%d\n", __func__, ifp->if_name,
+ ifp->if_unit);
+ m_freem(m);
+ return (EJUSTRETURN);
+}
+
+static errno_t
+pflogaddproto(struct ifnet *ifp, protocol_family_t pf,
+ const struct ifnet_demux_desc *d, u_int32_t cnt)
+{
+#pragma unused(ifp, pf, d, cnt)
+ return (0);
+}
+
+static errno_t
+pflogdelproto(struct ifnet *ifp, protocol_family_t pf)
+{
+#pragma unused(ifp, pf)
+ return (0);
+}
+
+int
+pflog_packet(struct pfi_kif *kif, struct mbuf *m, sa_family_t af, u_int8_t dir,
+ u_int8_t reason, struct pf_rule *rm, struct pf_rule *am,
+ struct pf_ruleset *ruleset, struct pf_pdesc *pd)
+{
+#if NBPFILTER > 0
+ struct ifnet *ifn;
+ struct pfloghdr hdr;
+
+ if (kif == NULL || m == NULL || rm == NULL || pd == NULL)
+ return (-1);
+
+ if (rm->logif >= PFLOGIFS_MAX ||
+ (ifn = pflogifs[rm->logif]) == NULL || !ifn->if_bpf) {
+ return (0);
+ }
+
+ bzero(&hdr, sizeof (hdr));
+ hdr.length = PFLOG_REAL_HDRLEN;
+ hdr.af = af;
+ hdr.action = rm->action;
+ hdr.reason = reason;
+ memcpy(hdr.ifname, kif->pfik_name, sizeof (hdr.ifname));
+
+ if (am == NULL) {
+ hdr.rulenr = htonl(rm->nr);
+ hdr.subrulenr = -1;
+ } else {
+ hdr.rulenr = htonl(am->nr);
+ hdr.subrulenr = htonl(rm->nr);
+ if (ruleset != NULL && ruleset->anchor != NULL)
+ strlcpy(hdr.ruleset, ruleset->anchor->name,
+ sizeof (hdr.ruleset));
+ }
+ if (rm->log & PF_LOG_SOCKET_LOOKUP && !pd->lookup.done)
+ pd->lookup.done = pf_socket_lookup(dir, pd);
+ if (pd->lookup.done > 0) {
+ hdr.uid = pd->lookup.uid;
+ hdr.pid = pd->lookup.pid;
+ } else {
+ hdr.uid = UID_MAX;
+ hdr.pid = NO_PID;
+ }
+ hdr.rule_uid = rm->cuid;
+ hdr.rule_pid = rm->cpid;
+ hdr.dir = dir;
+
+#if INET
+ if (af == AF_INET && dir == PF_OUT) {
+ struct ip *ip;
+
+ ip = mtod(m, struct ip *);
+ ip->ip_sum = 0;
+ ip->ip_sum = in_cksum(m, ip->ip_hl << 2);
+ }
+#endif /* INET */
+
+ ifn->if_opackets++;
+ ifn->if_obytes += m->m_pkthdr.len;
+
+ switch (dir) {
+ case PF_IN:
+ bpf_tap_in(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
+ break;
+
+ case PF_OUT:
+ bpf_tap_out(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
+ break;
+
+ default:
+ break;
+ }
+#endif /* NBPFILTER > 0 */
+ return (0);
+}
projects / apple / xnu.git / blobdiff